Well, the best thought is with two weeks to spend is to pick no more than two bases. With the itinerary you have outlined you will lose an entire day (at least) moving from one base to the next with all the packing/unpacking, train transport, logistics, etc. That's four days of your 14 (? depending on where you are coming from this could be more like 11 - 12) days vacation. The more you move around, the less you see and experience. Trying to "see it all" will result in you seeing this glorious part of the world mainly through the window of a train, much like you were watching it on television.

We can provide more helpful suggestions if you give us more information. What do you and your kids like to do? I see in your post that hiking as a possibility. The Bernese Oberland is heaven for that. The castles in Füssen don't take a lot of time once you are there, but it's a heck of a long way to Füssen from the BO (like 8 - 9 hours). The only way you can get into the castles is through the guided tours, which last 35 mins each. Of course, there is lots of time to spend looking at the exteriors, picking up your tickets (which must be pre-arranged and picked up no later than one hour before your scheduled tour time). Why are you interested in Salzburg? What has prompted you to pick Innsbruck as a hiking destination? And so on.

Happy to help but please give us more to go on.